#a{
	
}
#b{
	background:#515151;
	font-size:14px;
	color:#ffffff;
	height:27px;
	text-align: center;
	}
	#b ul{
	  list-style-type:none;
	}
	#b li{
	  float:left;
	  text-align:center;
	  line-height:27px;
	}
	#b li a{
	  display:block;
	  width:100px;
	  color:#FFF;
	  text-decoration:none;
	}
	#b li a:hover{
	  background:#f00;
	  color:#fff;
	}
#c{
	display: block;
	text-align: center;
}
#d{
	background:#515151;
	font-size:14px;
	color:#ffffff;
	height:27px;
	text-align: center;
	}
	#d ul{
	  list-style-type:none;
	}
	#d li{
	  float:left;
	  text-align:center;
	  line-height:27px;
	}
	#d li a{
	  display:block;
	  width:100px;
	  color:#FFF;
	  text-decoration:none;
	}
	#d li a:hover{
	  background:#f00;
	  color:#fff;
	}
#e{
	display: block;
	height: 600px;
	width: auto;
	text-align: center;
	font-family: "microsoft yahei";
	font-size: 14px;
}
#ab{
	text-align: center;
}
#f{
	display: block;
	background-color: blue;
	height: 300px;
	width: auto;
	text-align: center;
	color: aliceblue;
}